<!--  -->
<template>
  <el-breadcrumb class="app-breadcrumb" separator="/">
    <transition-group name="breadcrumb">
      <el-breadcrumb-item v-for="(item, index) in levelList" :key="item.path">
        <span
          v-if="item.redirect === 'noRedirect' || index == levelList.length - 1"
          class="no-redirect"
          >{{ item.meta.title }}</span
        >
        <a v-else @click.prevent="handleLink(item)">{{ item.meta.title }}</a>
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script>
import * as pathToRegexp from 'path-to-regexp'
export default {
  name: "",
  components: {},
  data() {
    //这里存放数据
    return {
      levelList: null,
    };
  },
  computed: {},
  watch: {
      $route(route) {
      if (route.path.startsWith('/redirect/')) {
        return
      }
      this.getBreadcrumb()
    }
  },
  methods: {
    getBreadcrumb() {
      let matched = this.$route.matched.filter(
        (item) => item.meta && item.meta.title
      );
       const first = matched[0]
      if (!this.isDashboard(first)) {
        matched = [{ path: '/home', meta: { title: '首页' }}].concat(matched)
      }
      this.levelList = matched.filter(
        (item) => item.meta && item.meta.title && item.meta.breadcrumb !== false
      );
    },
      pathCompile(path) {
      // To solve this problem https://github.com/PanJiaChen/vue-element-admin/issues/561
      const { params } = this.$route
      var toPath = pathToRegexp.compile(path)
      console.log( toPath(params),this.$route)
      return toPath(params)
    },
    handleLink(item) {
      const { redirect, path } = item
      if (redirect) {
        this.$router.push(redirect)
        return
      }
      this.$router.push(this.pathCompile(path))
    },
    isDashboard(route) {
      const name = route && route.name;
      if (!name) {
        return false;
      }
      return (
        name.trim().toLocaleLowerCase() === "Home".toLocaleLowerCase()
      );
    },
  },
  created() {
    this.getBreadcrumb();
  },
};
</script>
<style lang='scss' scoped>
/*@import url(); 引入公共css类 */
.app-breadcrumb.el-breadcrumb {
  display: inline-block;
  font-size: 14px;
  line-height: 50px;
  margin-left: 8px;

  .no-redirect {
    color: #97a8be;
    cursor: text;
  }
}
</style>
